Smoke-conductor chimney-cowl.



No. 833,151. PATENTED OCT. 16. 1906. W. R. A. BALL & R. W. WEAVER. SMOKE CONDUCTOR CHIMNEY OOWL.

APPLICATION FILED APB..28,1906.

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[NVENTORS Ewe/2 WWW/er W ITNESSES:

A TTORNE Y5 THE NORRIS PETERS cu, WASHINGTON. n. c.

UNITED STATES PATENT OFFICE.

WILLIAM ROBERT ANDREWS BALL AND ROBERT WILLIAM WEAVER, OF ST. THOMAS, NORTH DAKOTA.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed April 28, 1906. Serial No. 314,318,

To all whom it may concern:

Be it known that we, WILLIAM ROBERT ANDREWS BALL and ROBERT WILLIAM WEA- VER, citizens of the United States, residing at St. Thomas, in the county of Pembina and State of North Dakota, have invented a new and useful Smoke-Conductor Chimney-Cowl, of which the following is a specification.

This invention relates to chimney-cowls, and has for its object to provide a comparatively simple and inexpensive device of this character by means of which a uniform draft in the chimney or smoke-stack may be insured regardless of the direction or sudden changes and variations of the Wind-currents.

A further object of the invention is to provide a cowl having a pair of pivoted shutters or wings operatively connected to each other through the medium of a rod the length of which is less than that of the hood of the cowl, so that when one of the wings is moved to open position the hood will automatically close the adjacent draft-opening, and thereby effectually prevent downdraft in the chimney or smoke-stack.

A further object is to form the Wings with laterallyextended spring lips or flanges adapted to yieldably engage the adjacent walls of the hood, thereby to assist in retaining the wings in closed position.

A further object of the invention is to generally improve this class ofdevices so as to increase their utility, durability, and eflioiency, as well as to reduce the cost of manu facture.

With these and other objects in vieW the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, and illustrated in the accompanying drawings, it being under stood that various changes in form, proportions, and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings, forming a part of this specification, Figure 1 is a perspective view of a chimney-cowl constructed in accordance with my invention. Fig. 2 is a vertical sectional view looking in the direction of one of the pivoted Wings or shutters. Fig. 3 is a transverse sectional view of one of the shutters, showing the lips or flanges in engagement with the side walls of the hood.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved device consists of a horizontally-disposed hood 5, preferably cylindrical in shape, as shown, and provided With oppositely-disposed draft-openings 6 and 7, said hood being provided with a depending extension 8 for attachment to a chimney, smokestack, or other smoke-conductor. Pivotally secured to the opposite ends of the hood 5 at the draft-openings 6 and 7, as by hinges 9, are oppositely-disposed shutters or Wings 10 and 11, adapted to alternately engage the adjacent ends of the hood 5 and close the draftopenings. The wings or shutters are extended a short distance above the top walls of the hood to permit the attachment of the hinges 9, and formed in the extended portions of said shutters or wings are alined openings or perforations 12, adapted to receive the hooked ends 13 of a connecting-rod 14. The connecting-rod 14 is of less length than the length of the hood, so that when one of the wings or shutters is moved to closed position the opposite wing will be automatically opened, so as to permit the escape of smoke or other particles of combustion from the chimney.

The opposite longitudinal edges of the wings or shutters 10 and 11 are formed with laterally-extending lips or flanges 15, adapted to engage the adjacent walls of the hood 5 at the draft-discharge openings and assist in retaining said shutters in closed position. The spring looking-lips 15 are bent inwardly at 16 to form parallel flanges 17, which serve to strengthen and reinforce the wings and prevent buckling of the same when subjected to the action of the elements. It will thus be seen that regardless of the direction or the sudden changes and variations in the wind-ourrent a uniform draft in the chimney will be assured. The chimney-cowl may be made of different sizes and shapes and may be plated, japanned, or otherwise coated to protect the same against the action of the elements.

It will of course be understood that the wings or shutters may be pivotally mounted on the side or bottom of the cowl and that the latter may be made in different sizes and shapes.

Having thus described the invention, what is claimed is 1. A chimney-cowl comprising a horizontal hood provided with oppositely-disposed draft-openings, wings pivotally mounted for swinging movement on the hood and adapted to alternately close the draft-openings, a pivot connection between said wings, and means carried by the wings and adapted to engage the walls of the hood. to assist in holding or retaining the wings in closed position.

2. A chimney-cowl comprising a horizontal hood provided with oppositely-disposed draft-openings, wings pivotally mounted for swinging movement on the hood and adapted to normally close the draft-openings, a rod forming a pivotal connection between the pivoted ends of the wings, and laterally-(lisposed lips carried by the wings and adapted to engage the side walls of the hood when the wings are moved. to closed position.

3. A chimney-cowl com rising a horizontal hood having opposite -disposed draftopenings, wings pivotally mounted for swinging movement on the hood and adapted to alternately close the draft-openings, a connection .between the pivoted ends of the wings, and spring locking-lips carried by the wings and adapted to engage the side walls of the cowl when the wings are moved to closed position.

4. A chimney-cowl comprising a horizontal hood provided with oppositely-disposed draft-openings, wings pivotally mounted for swinging movement on the hood and adapted to alternately close the draft-openings, a connection between the pivoted ends of the wings, lateral lips secured to the opposite edges of the wings and adapted to engage the side walls of the hood when said wings are in closed position, a portion of said lips being bent inwardly against the adjacent face of said wings to form oppositely-disposed reinforcing-flanges.

5. A chimney-cowl comprising a horizontally-disposed body portion provided with terminal draft-openings and a central depending extension for attachment to a smokeconducting pipe, wings pivotally mounted for swinging movement on the hood and adapted to alternately close the draft-openings, a rod connecting the pivoted ends of the wings and of less length than the length of the hood, and reinforcing-flanges extending vertically of the wings at the opposite longi tudinal edges thereof, a portion of said flanges being bent laterally to form lips adapted to engage the side walls of the hood when said wings are in closed position.

In testimony that we claim the foregoing as our own we have hereto afiixed our signatures in the presence of two witnesses.

WILLIAM ROBERT ANDREWS BALL. ROBERT WILLIAM WEAVER.

Witnesses:

T. A. MILLER, H. L. KIRLEN. 

